Thirty seconds later, with the Crimson on the power play, Dunn received passes from sophomore defenseman Pan Van Reesma and co-captain Angie Francisco and beat Nascaro to give Harvard the lead at 2-1.
The third period continued with Dunn's offensive outburst.
At 3:13, Dunn was assisted by Francisco to score the eventual game-winning goal and give the Crimson a 3-1 advantage.
Three minutes later, Niagara junior forward Stephanie Romaine beat Kuusisto to score the Purple Eagles' second goal and bring Niagara within one at 3-2.
However, Dunn would make sure the game did not slip away, lighting the lamp at 17:55 off assists from Francisco and sophomore defenseman Jamie Hagerman for a 4-2 lead.
Harvard was not done with its scoring. With one minute left in the game, freshman forward Lauren McAuliffe dented the scoreboard with her first goal of the season and gave the Crimson a 5-2 lead.
The stars for the Crimson were Suurkask, who now has four points in the season, and Dunn, who also has four points, three of them goals. Kuusisto also played well, recording a 1.50 goals-against-average over the weekend.
Harvard's next game will be Saturday at Dartmouth. The Big Green (4-0-0, 4-0-0 ECAC) is ranked No. 1 in the nation and looking to continue its dominance over the Crimson. Last year, Dartmouth swept Harvard in three meetings, including the ECAC semifinal.